Originally Posted By: rkulla
This post was automatically imported from our archived forum.
When a battery backup is added to an existing sump discharge line, does the backup discharge line need a check valve of it’s own? In the home I inspected today the backup was T’d into the main line above the main check valve. I think without a check valve of its own it would allow back fill into the basket threw the battery backup. If the exterior line ever froze up it could possibly flood the basement. I think it needs it’s own check valve in this case.
Custom Home Inspections
Maple Grove, MN